This avoids using Mix while compiling which simplifies
a number of things and let us do further build improvements
later on.
Elixir is only enabled from within rabbitmq_cli currently.
Eunit is disabled since there are only Elixir tests.
Dialyzer will force-enable Elixir in order to process
Elixir-compiled beam files.
This commit also includes a few changes that are
related:
* The Erlang distribution will now be started for parallel-ct
* Many unnecessary PROJECT_MOD lines have been removed
* `eunit_formatters` has been removed, it provides little value
* The new `maybe_flock` Erlang.mk function is used where possible
* Build test deps when testing rabbitmq_cli (Mix won't do it anymore)
* rabbitmq_ct_helpers now use the early plugins to have Dialyzer
properly set up
## Why?
To introduce AMQP over WebSocket, we will add gun to the Erlang AMQP
1.0 client. We want to add the latest version of gun for this new
feature. Since rabbitmq_peer_discovery_etcd depends on the outdated
eetcd 0.3.6 which in turn depends on the outdated gun 1.3.3, this commit
first upgrades eetcd and gun.
## How?
See https://github.com/zhongwencool/eetcd?tab=readme-ov-file#migration-from-eetcd-03x-to-04x
## Breaking Changes
This commit causes the following breaking change:
`rabbitmq.conf` settings
* `cluster_formation.etcd.ssl_options.fail_if_no_peer_cert`
* `cluster_formation.etcd.ssl_options.dh`
* `cluster_formation.etcd.ssl_options.dhfile`
are unsupported because they are not valid `ssl:tls_client_option()`.
See https://github.com/erlang/otp/issues/7497#issuecomment-1636012198
* A new dependency on eetcd (ASL2-licensed)
* Connection management
* Lease acquisition for node key
* Initial registration function implementation
With assistance from @kjnilsson.
Part of #22.
Loïc Hoguin
David Ansari
Michael Klishin
Loïc Hoguin
Philip Kuryloski
Luke Bakken
Michael Klishin
Jean-Sébastien Pédron
Daniil Fedotov